13320231 has 16 divisors (see below), whose sum is σ = 18950400. Its totient is φ = 8293248.

The previous prime is 13320221. The next prime is 13320233. The reversal of 13320231 is 13202331.

It is not a de Polignac number, because 13320231 - 2⁷ = 13320103 is a prime.

It is a super-2 number, since 2×13320231² = 354857107786722, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 13320231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13320233) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6150 + ... + 8028.

It is an arithmetic number, because the mean of its divisors is an integer number (1184400).

Almost surely, 2^13320231 is an apocalyptic number.

13320231 is a deficient number, since it is larger than the sum of its proper divisors (5630169).

13320231 is a wasteful number, since it uses less digits than its factorization.

13320231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2038.

The product of its (nonzero) digits is 108, while the sum is 15.

The square root of 13320231 is about 3649.6891648468. The cubic root of 13320231 is about 237.0485221736.

Adding to 13320231 its reverse (13202331), we get a palindrome (26522562).

The spelling of 13320231 in words is "thirteen million, three hundred twenty thousand, two hundred thirty-one".